A coherent, typically large body of matter with no definite shape.
The mass of the iceberg was visible from miles away.
A large number of people or objects crowded together.
A mass of protesters gathered in the city square.
The quantity of matter that a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field.
The mass of the object was calculated using a balance scale.
A celebration of the Eucharist in the Roman Catholic Church or certain other Christian churches.
The family attended Mass every Sunday morning.
A large amount or quantity of something.
There was a mass of evidence against the suspect.
The people in society considered as a whole, especially the general public; usually used with the definite article.
The mass of the population had little influence on government policy.
massverb
To come together in a large group or crowd.
Protesters began to mass in the city square.
To gather or accumulate in large quantities.
Clouds massed on the horizon, signaling an approaching storm.